/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.verifier.visitor;

import java.util.List;

import org.drools.lang.descr.TypeDeclarationDescr;
import org.drools.verifier.components.Field;
import org.drools.verifier.components.Import;
import org.drools.verifier.components.ObjectType;
import org.drools.verifier.data.VerifierData;

public class TypeDeclarationDescrVisitor {

    private final VerifierData data;

    public TypeDeclarationDescrVisitor(VerifierData data) {
        this.data = data;
    }

    public void visit(List<TypeDeclarationDescr> typeDeclarationDescrs) {
        for ( TypeDeclarationDescr typeDeclaration : typeDeclarationDescrs ) {
            Import objectImport = data.getImportByName( typeDeclaration.getTypeName() );
            String objectTypeName;
            if ( objectImport == null ) {
                objectTypeName = typeDeclaration.getTypeName();
            } else {
                objectTypeName = objectImport.getName();
            }

            ObjectType objectType = this.data.getObjectTypeByFullName( objectTypeName );

            if ( objectType == null ) {
                objectType = new ObjectType();
                objectType.setName( typeDeclaration.getTypeName() );
                objectType.setFullName( typeDeclaration.getTypeName() );
                data.add( objectType );
            }

            for ( String fieldName : typeDeclaration.getFields().keySet() ) {

                Field field = data.getFieldByObjectTypeAndFieldName( objectType.getFullName(),
                                                                     fieldName );
                if ( field == null ) {
                    field = ObjectTypeFactory.createField( fieldName,
                                                           objectType );
                    field.setFieldType( typeDeclaration.getFields().get( fieldName ).getPattern().getObjectType() );
                    data.add( field );
                }
            }
            for ( String metadata : typeDeclaration.getMetaAttributes().keySet() ) {
                objectType.getMetadata().put( metadata,
                                              typeDeclaration.getMetaAttribute( metadata ) );
            }
        }
    }

}